durain

例句：

1. 1. The river is expected to flood again tomorrow.
   预计明天河水将再次泛滥。
2. 2. The drain was clogged and caused the water to back up.
   排水管堵塞导致水倒灌。
3. 3. The floodwaters washed away the old buildings.
   洪水冲走了旧建筑。